[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] improve x86 page table handling performance

  • To: Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Tue, 27 Mar 2007 08:44:52 +0100
  • Delivery-date: Tue, 27 Mar 2007 00:42:55 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdwQ826DFLntNw3EduuUwAWy6hiGQ==
  • Thread-topic: [Xen-devel] [PATCH] improve x86 page table handling performance

On 27/3/07 07:22, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> The single change to pte_clear() yields a 25-30% boost for kernel builds
>> on a 4x2x2 CPUs, 8Gb box; the other changes together yield improvements
>> of 2-5%.
> I shall clarify that this is for the PAE case only (i.e. resulting from the
> folding of two page faults into a single hypercall, which is being used in the
> kmap path).

Spotted that. The patch is pretty big but I think probably all good. I've
been away for a week so catching up on patches...

 -- Keir

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.